Finder for cameras.



C. BORNMANN.

FINDER FOR CAMERAS.

APPLICATION FILED MAR. 13, 1915.

1 1 80,252. Patented Apr." '18, 1916.

STATES PATENT OFFICE.

, cam. roimmann, or smennmron, NEW YORK, ASSIGNOR T0 ANSCO COMPANY, or

- 1 nmenamron, NEW roan, A coaroaarron or raw YORK.

FINDER FOR CAMERAS.

To all whomz't may concern:

Be it known that I, CARL BORNMANN, a

citize'nof the United States, and a resident as heretofore made, so far as I am aware,-

has' been that the sides of the finder are open, through which openings side lights and dust are admitted. The dust soon dulls the lens, mirror and observation plate and because of the side lights the image is much reduced in brilliancy.

My improvement consists in so constructing the finder that all its sides are closed except those that contain the lens and the observation plate, thus overcoming the difficulties above mentioned since dust is excluded and all light except that which enters through the lens is out o The construction also makes the finder appear as a solid body, materially improving its appearance while still retaining the convenience of folding; and finally the finder can be opened completely and more easily than any other known to me, for the purpose of cleaning.

Referring to the drawings, Figure 1 is a sidewise elevation of the finder in position for use; Fig. 2 is a front elevation of the finder; Fig. 3 is a rear elevation of the finder; Fig. 4 is a sidewise elevation of the finder folded; Fig. 5 is a vertical sectional view of the finder through about its medial line, the parts being opened out for cleanmg.

In the drawings, 1 represents a bracket, or equivalent. device, whereby the finder may be attached to and suitably supported upon the desired part of the camera structure, as is well understood. I show screw holes 2 in the bracket for this purpose. Any other suitable means for supporting the finder may be employed.

3 (See Fig. 5) is the front plate of the finder. It is centrally perforated, as usual, for the exposure opening, and is provided with side flanges 4, 4, near the upper end of each of which is an open sided notch 5.

, 6 (see Fig. 5) is the lens-supporting tube. It is provided with an inner washer 7 and an "Specification of Letters Patent. Application filed March 13, 1915. Serial 0. 14,087.

tes to a finder of the Patented Apr. 18', 1916.

outer confinlng ring 8, or any other suitable construction may beemployed. The inner end of thetube 6 is turned over outwardly as at 9, thus holding the front plate 3 in position 1n such manner that it and all the other parts can make partial rotation by a slipping action aboutthe upper part of the brackezt 1.

. 10 see Fig. 1) is the main or body art of the finder. It comprises a back plat 11 and two triangularly shaped side plates 12,

12; The back plate is pivoted at its lower edge by a pintle 13 to the lower ends of the flanges 4, 4, of the front plate and it has a spring 14, 1n this instance shown as coiled about the pintle, which normally maintains the body part in its retracted or non-folded position. At the upper front edge of each side plate there is a cut away part15 which acts as a gulde and stop for certain pins about to be described on the free edge of the top plate 16 of the finder. This plate carries the usual observation glass 17 and is pivoted at its rear edge to the upper edge of the back plate 11 by a pintle 18 similar to the pintle 13. It also has a spring 19 which normally tends to close the top plate down upon the upper edges of the side plates. At each front corner of the top plate there is a laterally projecting pin 20, which when the top plate is in operative position, as shown best in Figs. 1 and 2, engages in the notches 5, 5, in the upper ends of the flanges 4, 4, of the front plate, thus holding the body part and the top plate against the stress of the spring 14, which normally tends to throw them over backwardly, and the relation between the parts is such that when the finder is folded and the body part and the top plate are swung forwardly over the upper edge of the front plate, as shown in loo side plates and no dust or but little of it can enter, and practically no light can do so except through the lens. If the operator desires to take a vertical picture instead of a'horizontal one, then the finder is given a quarter turn on its bracket. and the camera being correspondingly manipulated, the expgsure will be made as before, for there has en no change in the relative positions of the operativev parts. When it is desired to fold the finder, mere pressure on its 'rear.

upper edge will cause the body'part and the top plate to slide over forwardly into the osition shown in Fig. 4, which bringsthe orward linev of the parts into' the same plane as the other parts of the lens su porting franie and the slight projection 0 these parts rearwardly is of no consequence be.' .cause there is always vacant space sufiicient for their reception adjacent to the small end.

of the bellows. When it is desired to clean the lens, the mirror and the observation plate, then the parts are folded outwardly and rearwardly, as shown in Fig. 5, against tinuous side as I 2. A'folding finder the bod part whereof the stress of the two springs 14 and 19. It will be obvious to those who are familiar with such matters that changes may be made in the details of the construction shown and described and yet the essentials of the invention be retained. I therefore do ,not limit myself to such details.

I claim:- 1 1. A folding finder thebod part whereof is pivotally connected to the ront plate and comprisesa continuous back plate and conplates.

is pivotally connected to the ront plate and comprises a continuous back plate and 'continuous side plates and a top plate pivotally connected to the bodypart.

3. A folding finder the bod part whereof is pivotally connected to the ront plate and comprises a continuous back plate and continuous side plates, a top plate pivoted to the body part and a spring at each pivotal connection which normally cause the.body

part and the top plate to assume and maintain operative positions. v

4. A folding finder the body part whereof is pivotally connected to the front plate, a top plate pivotally connected to the body part and a spring at each pivotal connection which normally cause the top plate to assume positions.

ody part and the against .the stress of said whereby the body part wi by the body part and and maintam operative I 5. A folding finder the body part whereof is pivotally connected tothe front-plate, a top plate pivotally connectedto the body part, and a sprin "af'each'pivotal connection which-normal 'y cause the body part and the top plate to assume and maintain operative positions and means on the body part and on the top plate which cooperate to holdthe parts in proper relative positions springs w oil they are folded. I

' 6. A folding finder the part whereof is pivotally connected to the rontplate and which comprises a top plate, 'a back plate and two side plates, the top late adapted to fold on one side and the bac plate on the opposite side of the front late and means be maintained in both folded and distended positions.

7. A folding finder the body an whereof comprises a top plate, a back p ate and two sidejplates, theback 'plate'being ivoted at its'lower. edge to-the lower edge 0 the front plate, and the top late pivoted at its rear .edge to the top e ge of :theback plate, a I spring at each, of said ivotalpoints and disengageable engaging evices on the'front edge of the top plates and onthe' front supporting plate whereby the bod positions.- 1 p 8. A foldingfinder the body art whereof comprises a top plate, a back p ate and two side plates, the back plate being ivoted at its lower edge to the lower edge 0 the front plate and the top (plate pivoted at its rear edge to the top e ge of'the back plate, a spring at each of said plivotal points where t e top plate are normally held in operative positions and disenga eable means 'on the top plate and on the side plates which cooperate to hold these parts in proper relative positions against the stress of the springs when they are folded and whereby also the top plate may be folded out rearwardly exposing the'interior of the finder. Y

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL BORNMANN. Witnesses:

. HENRY Ennasr W. Sam.

7 part and thetop plates are normally hel 1n.. operative 

